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Finding the Fourth Proportional to 71,385.72, 107,145 and 36,351.60

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Solution

The fourth proportional to 71,385.72, 107,145 and 36,351.60 is: 54,561.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,385.72 : 107,145 = 36,351.60 : x
  2. Step 2: Convert to fraction form
    71,385.72/107,145 = 36,351.60/x
  3. Step 3: Cross multiply
    71,385.72x = 107,145 × 36,351.60
  4. Step 4: Simplify right side
    71,385.72x = 3,894,892,182
  5. Step 5: Solve for x
    x = 3,894,892,182/71,385.72
  6. Step 6: Final answer
    x = 54,561.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.